针对空气源热泵在低温高湿环境下容易结霜问题，申请人提出一种以实现余热回收利用和高效节能为目标的新型无霜空气源热泵系统。本项目拟通过实验对除湿换热器与湿空气之间传热传质特性，蓄热装置蓄/释热规律的深入研究，明确主要部件的结构优化；综合分析除湿换热器、空气源热泵及蓄热装置在不同运行模式下的作用机理及耦合关系，量化再生过程用于再生干燥剂的能量比例分配，建立新型无霜空气源热泵系统非稳态仿真模型；并采用理论和实验相结合的研究方法，全面解耦性研究新型系统的动态特性，阐明各主要部件之间最优的匹配方式，拓展除湿及蓄热对无霜热泵运行特性影响的认识；并以系统COP和无霜运行时间为目标，提出最佳控制策略，进而提高系统整个周期运行的性能及稳定性。此研究为新型无霜空气源热泵系统的合理配置与优化提供基础数据，同时为空气源热泵技术的可持续发展与科学应用提供理论支持。

To solve the frosting problem of air-source heat pump at low temperature and high relative humidity, we propose a novel frost-free air-source heat pump system, which takes the waste heat recycling and efficient energy saving into consideration. In this project, firstly, the heat and mass transfer characters between EHECSD (an extra heat exchanger coated by a solid desiccant) and moist air, the law of storage and release heat will be studied thoroughly to optimize the structure of the main components. Secondly, The coupling mechanism of EHECSD and ESD (energy storage device) as well as air-source heat pump will be comprehensive analyzed at different work modes, and the energy of regenerating desiccant will be quantified at the regeneration mode. Thereafter, a dynamic simulation model of the novel frost-free air-source heat pump system will be developed. The dynamic coupling process of dehumidification, phase change thermal storage and heat pump will be analyzed by using theoretical and experimental methods to clarify the best matching pattern of the main parts of system. Expanding the understanding of the effect of dehumidification and phase change thermal storage on dynamic characteristic of the system. Finally, an optimal control strategy will be proposed to achieve the maximum COP and most reasonable frost-free working time. Those further form a frost-free working mode which couples with solid dehumidifying, air-source heat pump and phase change heat storage. This study can provide basic data for reasonable configuration and optimization of the novel frost-free air-source heat pump system, and provide meaningful theoretical support for the sustainable development and scientific applications of air-source heat pump technology.